Ibandronate affects bone growth and mineralization in rats with normal and reduced renal function
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Dagmar-Christiane Fischer & Claudia Jensen & Anja Rahn & Birgit Salewski & Günther Kundt & Geert J. Behets & Patrick D’Haese & Dieter Haffner
- چاپ و سال / کشور: 2011
Description
Bisphosphonates have been shown to attenuate ectopic calcification in experimental uremia. While they are known to reduce bone turnover, the effects on endochondral bone formation have not yet been addressed. To address this issue, we administered male Sprague-Dawley rats weekly subcutaneous injections of either vehicle or ibandronate (1.25 ىg/kg body weight) for a total of 10 weeks. The rats were randomly allocated into one of four groups: (1) vehicle-treated, sham-operated rats; (2) ibandronate-treated, sham-operated rats; (3) vehicle-treated, 5/6 nephrectomized rats; (4) ibandronate-treated, 5/6 nephrectomized rats. Bones were double labeled with tetracycline and demeclocycline in vivo, and tibiae were removed for analysis. Weight gain was similar in all groups. Ibandronate reduced body length gain and tibial growth rate in the shamoperated animals but not in the rats showing chronic renal failure (CRF). The height of the proliferative zone of the epiphyseal growth plate was reduced in the ibandronatetreated controls and tended to be reduced in CRF rats. A significant correlation between tibial growth rate and height of the proliferative zone was observed. Mineral apposition rates were significantly reduced in ibandronate-treated, sham-operated rats and tended to be reduced in CRF rats. In conclusion, ibandronate interferes with tibial growth and bone mineralization in young rats with normal and reduced renal function.
Pediatr Nephrol (2011) 26:111–117 DOI 10.1007/s00467-010-1660-5 Received: 4 June 2010 / Revised: 18 August 2010 / Accepted: 20 August 2010 / Published online: 15 October 2010
